UFO Sighting in Portland, Oregon on 2016-08-31 00:00:00 – Square/rectangular light craft, super speed, very small, in picture for three frames of video

My mom got video of a strange light occurrence.
in the video that she took of a small bird, a flash of rainbow lights around a stream of white light engulf the while screen (aimed at ground). it appeared to be glare from sin, but the white light in middle looked odd.
after a few seconds of this the video then shows for only three frames (this phone took video at 16fps) a strange rectangular or double cylindrical shaped object of light goes across the screen. i took stills of the object to be analyzed by anyone who can identify this for me.